According to Figures.com, there's a general release date for Futurama Toynami Wave 6, Clobberella (Leela) and Amy, in order to complete the 2nd Build-a-Bot, Robot Santa (with his arms and weapons). The possible release date is May/June, and I think is about time to release the last 2 figures to assemble Robot Santa.

There's also dates for Wave 7 (Hermes and Professor Farnsworth) and Wave 8 (Chef Bender and Momwith attachable Fat Suit). The tentative dates are July/August and October respectively. Both waves will let you complete the 3rd Buld-a-Bot, Roberto!

In the middle of Wave 7 and 8, there will be a "Encore Collection" Wave of Fry and Bender, that is good news for the fans that didn't get them the first time.. the bad news is that both do not include the Robot Devil pieces. Please check out the original Figures.com article.